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  1. #!/bin/bash
  2. s='aaa
  3. bbb
  4. ccc
  5. ddd
  6. eee
  7. fff
  8. ggg'
  9. sed -nE '/aaa|bbb/p' <<< "$s"
Success #stdin #stdout 0s 4476KB
stdin
Standard input is empty
stdout
aaa
bbb